Visit the Income Tax e-Filing portal: https://www.incometax.gov.in
Click on “Link Aadhaar Status”
Enter your PAN and Aadhaar number
Submit the details
Check the status shown on the screen
Use SMS to 567678 or 56161 in the format: UIDPAN
Check the reply SMS for the linking status
If needed, log in to the Income Tax portal and verify Aadhaar-PAN linking under profile or services section